This paper investigates the role of slip in a two-phase flow of Newtonian fluid. The nano-size Hafnium particles are used in the base fluid. The fluid under consideration is studied for two cases namely (i) fluid phase (ii) phase of particles. Both cases are examined for three types of geometries. The governing equations are simplified in nondimensional form for each phase along with boundary conditions. The resulting equations have been analytically solved to get exact solutions for both fluid and particle phases. Different features of significant physical factors are discussed graphically. The flow patterns have been examined through streamlines.
A Ni
single-atom catalyst with Ni–N4–x
C
x
active sites is prepared
in a single pyrolysis step in which the Ni single atom is incorporated
in the carbon framework through nitrogen and carbon coordination utilizing
the ionothermal synthesis method. In comparison to the complicated
synthesis procedures of single-atom catalysts, this method provides
a general and facile method to obtain single-atom catalysts with an
opportunity to synthesize catalysts at a large scale. The precursors
used in this method such as adenine, fructose, and glucose are derived
from the biomass which is the essential requirement for a green process.
The synthetic procedure developed here enables tunable properties
of the catalysts, such as the density of active sites and characteristics
of the carbon framework. In this study, the catalytic properties of
our materials are investigated for an electrochemical CO2 reduction reaction. The overall catalytic activity of the catalyst
depends on the density of active sites, but the properties of the
carbon framework also affect the intrinsic activity of the catalyst.
From the commercial prospect, a Ni single-atom catalyst with a high
density of Ni–N4–x
C
x
active sites can achieve a current density
of −300 mA cm–2 with a CO faradaic efficiency
of 99.4% at an overpotential of 235 mV in a gas diffusion electrode
cell system.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.